Guide d'achat
SQL Server — Serveur+CAL vs Par cœur
Choisissez entre les deux modèles de licence SQL Server grâce à un calcul de seuil de rentabilité clair et des exemples concrets.
Les deux modèles
Microsoft commercialise SQL Server Standard de deux façons : licence Serveur + CAL Utilisateur/Appareil, ou licence Par cœur. L'édition Enterprise est disponible uniquement en Par cœur.
Le modèle Par cœur est vendu en packs de 2 cœurs avec un minimum de 4 cœurs par processeur. Vous devez licencier tous les cœurs physiques de la machine, pas seulement ceux utilisés par SQL.
Quand Serveur+CAL est avantageux
Serveur+CAL est moins cher lorsque le nombre d'utilisateurs est connu, délimité et faible. Applications internes, back-ends ERP, outils BI utilisés par une équipe financière ou opérationnelle définie.
En règle générale, avec moins de ~50 utilisateurs nommés sur l'édition Standard, Serveur+CAL est la solution la moins coûteuse.
Quand Par cœur est avantageux (et quand il est obligatoire)
Par cœur est obligatoire lorsque la charge de travail est accessible depuis Internet, anonyme ou utilisée par des populations d'utilisateurs inconnues ou très importantes. Applications web publiques, portails clients, tout ce qui est exposé à un trafic anonyme.
Par cœur est également avantageux pour les petits et moyens nombres de cœurs avec de nombreux utilisateurs — au-delà de ~50 utilisateurs sur un serveur de 4 à 8 cœurs, Par cœur atteint le seuil de rentabilité.
Exemple concret
Entreprise de taille intermédiaire avec une application RH interne : serveur 8 cœurs, 40 utilisateurs RH nommés. Serveur+CAL s'impose — 1 licence serveur + 40 CAL.
La même entreprise ajoute un portail public de candidature sur la même base de données — ce trafic étant anonyme, la licence Par cœur est désormais obligatoire pour cette charge de travail.
Licences recommandées
SQL Server 2022 Standard
Perpetual · Server + CAL or Per-Core
Mainstream SQL Server 2022 for departmental and small-business workloads.
SQL Server 2022 Enterprise
Perpetual · Per-Core
Enterprise SQL 2022 — unlimited scale, full HA, advanced analytics.
SQL Server 2022 User CAL — 5-pack
5 User CALs · SQL 2022
5 SQL Server 2022 User CALs (Server+CAL licensing).
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